Burt, S. Alexandra http://orcid.org/0000-0001-5538-7431
Plaisance, Kathryn S. http://orcid.org/0000-0002-9455-8253
Hambrick, David Z.
Funding for this research was provided by:
Genetics of Human Agency
Article History
Received: 27 November 2017
Accepted: 3 August 2018
First Online: 13 August 2018
Compliance with ethical standards
:
: S. Alexandra Burt, Kathryn S. Plaisance, David Z. Hambrick declare that they have no conflict of interest.
: The described study has been approved by the Michigan State University IRB.
: All participants give informed consent (informed consent is obtained by one parent since the twins are younger than 18 years old).